Though Hilton insists Richards is "doing well" after being discharged, the reality star's stint in rehab wasn't easy at the time. "She tried to leave and ended up coming back," one insider told Us in December, adding that the former child actress was "very defiant."

"Kim's alcohol addiction along with other substance abuse problems has been obvious for quite some time," a close pal told Us in early December, shortly after the TV star sought treatment. "It's really good that she's finally getting help."